Mining machine



April 9, 1935. l MP. HOLMESv 1,996,756.

MINING MACHINE 3 sheets-sheet 2 M. P. HOLMES MINING MACHINE Filed June 9, 1931 April 9, 1935.

April 9, 1 935- M, P. HOLMES 1,996,766

MINING MACHINE HF'iled June 9, 1931 5 Sheets-Sheet 5 51 Z9 5a I .I 12g/1z0 ,"af/ 109112 I xlg'lg `Jzv'zfarf Zorrtb/linew.

53AM; 4MM.'

Patented Apr. 9, 1935r f i UNITED sriiss'v v MINING n n m Morris I. Holmes, Claremont, N. H., assignor to'. T 'y Sullivan Machinery. Company, acorporation of Massachusetts I Appucation' June 9,'-1931, seria.1 No.54a'14e .-cl'olaimsi (c1. 26a-3o) l This invention relates to mining machines, and more particularly to improvements incoalV mining machines of the ilexibly fed, continuous cutter type having improved adjustable kerf cutting An object of this invention is toA provide an improved coal mining machine. Another object is to provide an improvedcoalfmining 'machineV of the flexibly fed, continuous cutter type having` improved adjustable kerf cutting mechanism whereby the kerf cutter may be positioned into different elevated positions. A further object is to provide an improved coal mining machine of `the flexibly fed, longwall *type having improved means for adjusting thel kerf cutter into `different elevated positions and for swinging the kerf cutter about its pivot. A further object is to -provide an improved longwall coal mining machine of the Yflexibly fed type having improved power operated means for swinging the kerf cutter about its pivot wherein the kerf cutter swinging means is operable entirely independently of the machine feeding means. Still another object is to provide an improved adjustable cutter head for a longwall coal mining machine. Yetr another object is to provide an improvedcoal mining machine of the overcutting, longwall type wherein the kerf .cutter` is positionable to cut kerfs at diiferent elevations above the mine floor. These and other objects and advantages of the invention will, however, hereinafter morefully appear. Y v

In the accompanying drawings there is shown for purposes of illustration one form whichl the invention may assume in practice.

In these drawings,-

, 1 Fig. 1 is a plan view of the illustrative embodiment of the improved coal mining machine.

Fig. 2 is vaside elevational view of the machine shown in Fig. 1. Y A

Fig. 3 is a longitudinally extending vertical sectional -vi'ew taken substantially on line 34-3 of Figsfl and l. s

Fig. 4 is a horizontal sectional view taken sub` stantially on line d K-4 of Figs. 2 and 3.

Fig;y 5 is awdevelopedV vertical Asectional view taken substantially on line 5--5 of Fig. 4.

Fig. 6 isa detail view illustrating the improved clutch controlling means. y

vIn this illustrative embodiment Vof the invention there isshown Va coal mining machinefof therexibly fed, continuous cutter, longwall type generally comprising a frame "lhaving a plane bottom surface 8 for slidably supportingjthe machine on the mine door. Pivotally'mounted at 9 on the machine frame forswinging movement in a horizontal direction is a kerf cutter |70 mounted in an improved manneron adjustable supportingA means, generallyrdesignated |I. The machineis fedover the mine floorat a high ma- 5 chine moving speed and at a relatively slow cutting speedfby flexible feeding Vmeans including a feed drumv I2 journaled on the forward end of the machine` frame for rotationabout avertical axis, and a feedcable or `ropel3 is wound `upon 10 this drum. Horizontal guide rolls I4 are jarranged at the opposite front corners of the ma-v chine frame, and these rolls are adapted to guide the feed` cable during the various operations of the machine. During feedingl the -free end of the feed. cable is connectible in a well known mannerV to` an anchorarranged adjacent the `coal facevinadvance of the machine.VV As the feedV cable |3 is drawn innby` the'feed drum |2, the miningmachine isfed bodily over the mine floor. Arranged within. the vmachine frame is ahorizontal motor |5,' herein lpreferably ofthe re' versible `electric` type; *having its power shaft horizontally disposed vand extending longitudif nallyof the machine, andthe forward end of 25 the motor power. shaft is operativelyconnected to the feed drum l2 through a plural speed transmission mechanism. of the same general charac-v ter as that described in my copending application Ser. No; V136,446, led Sept. l20,1926, now rV maturedy into Patent No. 1,815,872; patented July 21,1931.`V` @y Y "Now referring tothe improved adjustable kerf cutting mechanism, it will be noted that keyed to the rear end of jthe motor power shaft, as shown in Fig. 3, is a bevel pinion I6 meshing with ahorizontal bevel gear |1, keyed to a vertical shaft I8 l and lsuitably journaled in the cutter frame section I9. Rotatable with and driven by the bevel gear I'l is a spur pinion 20 meshing ,with a large 40 spur gear 2| keyed at 22 toa clutch sleeve23 ro-V tatably mounted/on; a vertical shaft 241` This shaft is suitably `journaled Awithin the cutter Y frame section lll` and has formed thereon` clutch teeth 25-connectiblebya sliding clutch memberV 45 26 to clutch teeth 2.1.formed on the clutch sleeve 23. It will thus be seen that when the clutch-26 is in its connected position and theclutchteeth 25, V21 are-connectedtogether, the shaft 24 may be driven by the gear 2| through the bevel gearing 50V PATENT i7 i the latter is splinedat 32.

rymg 'bearings within which ahouow shaft 'suYV is journaled, the shaft being arranged with its axis 'aline'd with that of shaft 24, which is liliewise made hollow. Mounted within the shaft is a shaft 3l, in this instance, telescopically arlV ranged within Vthe hollow shaft 24 and to which Y The elements 24 and 3i cooperate to provide an extensible driving connection in th'efrmeof a telescopic torque shaft between the driving element onthe frame and the 'driven elementen the adjustable support and the f splinedshaft 3| isfadjustable'in a verticaldirec; tion relative to the shaft 24 and isV driven by the f shaft 2|..Wthroughthefsplinedconnection `32, and

n keyed 'to the upper" end 1 of the shaft.Y 3| vis 'a sprocketY 33'which engages and drives a cutter l bit carrying cutter chain34 mounted on the margin of an,elongated'plan'e cutter ba`r'35 for circulation thereabout, the cutter chaineand cutter bar constituting. thekerf cutter (i0. /As shown in Fig. 3, the cutter bar 35 vis secured by bolts 36 to any annularn frame member'or swivel frame -31 having a radial flange @rotatably-mounted between spaced bearing `rings 35.k The bearing rings Varesuitahly supported within the 'adjustable frame rnember'fand are retained' in Yposition'by an annular ring-member V bolted- :to the frame 28 in the Ymanner'shown'. It willjthus'f'beseen' that the members-31, 39 formLaswivel'mounting for the kerf cutter on whichthe'latteris'mounted for swinging movement aboutl the aXis of ythe vertical shaft'iS'l. A

`The improved vmeans for swinging tliejkerf cutterabout its pivot hereiny comprises'a `vspur Y gear M 4rotatable with 'and Vdriven by the-spur gear 2|, Vandfrneshing with the spur'ge'ar 4|- are spur gears `ft2zandf||3 keyed to the'lower ends of parallel vertical shafts 44 and 45'res'pec`tively arranged vat opposite sides offthe longitudinal vertical center ofthe machine as shown Yinlligs. 4 and; Herein xed tothe'parallel' shafts 44 and 15,5 are worms `46f and 41 having teeth ofthe same pitch but of opposite 'inclination and f respectively meshing with *worml wheels 48 andllS. Theworm wheel disconnectible by "a multiplerdisc clutch 50 to a horizontal shaft 5| arranged transversely of the cutter frame section |9 and suitably jour-r naled therein. -Y The `worm, Wheel ||9fis connectiblek to the shaft 5| lby a'multiple disc clutch '52. Fixed to the yshaft 5| and-'drivefthereby lis a worm 53 meshing with a hcrizontalworm Wheel 54,hav ing Aits hub suitablywjournaled withini bearing sleeves 55; carried lW'ithrinfthe cutter frame 5 section.

The hub of this -wormwheel is splined at '5B to a vertical' shaft 51and'the shaft 51 entends 4throught-.he hub of the wormwhe'el and is driven by the worin wlee'el'through thesplined connection 55. The worm wheelhub vand the shaft 51 cooperate to provide an extensible driving connection in 'the form jof a telescopic torquel shaft similar to the telescopic torque shaft of the cutter chain drive. The upper endof the' shaft 51 is vnfiountedwithin a hollow sleeve 58 journaled' in a bearing59 supported"v by the adjustable'l frame Now` referring to the improved mechanism for adjusting the kerf cutter into different elevated positions, it will be observed that the shaft I8, as shown in Fig. 3, has formed integral therewith a bevel pinion 62 meshing with reverse bevels 63 and 615', as shown in Fig. 4. The reverse Abevels are selectively connectible to a Vhorizontal shaft 65 by multiple disc clutches 66'and 61 rev5, arekeyed at 16 at their upper ends to the adjustable'frame member 28 and are threaded at their `upper ends at '11gforfengagement with a tightening and holdingnut 18. It will thus be seen, that, dependingupon which of the disc clutches 55, 51 is applied, the adjusting nuts may be rotated in onejdirection'or the other to Vmove the radjusting screws 14` and 15 upwardly or downwardly, as desired, and as a result, the ad-r justable frame'Y member 28 upon which the kerf "cutteris swiveled, may be adjusted in a vertical direction relative to the vcutter frame section I9 toniove4 the kerf cutter intodiiferent horizontal planes.n It willbe notedthat as the adjustable frame supporting the kerf cutter is 'movedin a vertical direction relative to the cutter frame sectionV I9 the splinedshafts 3|"and 51 move axially within the "shaft 2li andthe `hub of worm wheel 54, respectively, the shafts -sliding freely relative to their cooperative parts as lthe frame moves. l y r e Themeans for guiding the adjustable kerf cut-` ter supporting frame 28 during adjustment thereof relative to the cutter fra-me section `I9 herein comprises parallel vertical guide rods 19, 19 eachy secured at its upper end by a screw and nut con nection V|30 within a bore 8| formed in a lateral "boss 82 integral with the adjustable frame member 28;,'1These parallel guide rods 1B are ,telescopically arranged and guided within vertically adjustable guide Vsleeves 83, `83 slidably arranged in vertical lbores 85. formed in thecutter frame section I9. Secured transversely within the lower ends of the guide rods are stop pins v85 movable in vertical slots 86 'formedY in `the hollow sleeves After the pins 85 Amove their distance of travel within the slots86 andthe projecting ends of the pins engage the upperends of the slots,

Vthe sleeves 83 then move with the guide rods, and

vertical movement of the sleeves is limited by stop screws 81 having their ends likewise vprojecting within the vertical slots 86; It will thus be seen that the guide rods 19 and-the guide sleeves 83 form a telescopic or extensible guiding arrangement for the adjustable kerf cutter supporting frameZS. 'Y l The improved means for controlling the various controlling clutches heretofore described, will now he described. As shown inFig. 3, engaging the-.sliding clutchmernber 26 is a pivoted shipper yoke 88in the form of a bell crankhaving an upst'anding bifurcated arm 89 engaging a trunnion yoke 9B mounted in aV groove 9| formed in meansl andthe top surface of- ;said imotcr, :and means operable .whollyzindependently of the feeding means forswingingisaidkerf cutterirelative to saidframe.

n 3. Inra mining machine, a .machine .ffra'me adapted to rest [upon and kslide :in any direction over` the mine floor, a ,horizontal motorfcarried y byfsaid.frame- ,andhaving'its power ,shafty extending longitudinally of :saidframe, feeding meansinsaid frame and driven'from the forward endof saidmotorrfor Vfeeding said frame overv the mine-floor, ,kerf cuttingmechanism Y mounted onsaid frame and driven from the rear end of 'said motor, .saidcutting mechanism including a horizontally'swingable kerf cutter, said motor arranged centrally. on'saidjirame between said cutting mechanism'and said feeding, means, means for'adjusting thekerf cutter :into different velevated positions relative .to the .'frame, vsaid kerf cutter whenin` lits lowermost position lying inY horizontal planes above .and swingablyhorizontally completely over ztheatop fof, said 4feeding means` and the top'surfaoe fof said .motor,*an'd Vmeans for lswinging saidkerf. cutter relative to said frame.Y

f4. Ina `mining machine, a machine `frame adapted to rest upon..and slide'lin .any .direction overvr the *mine floor, La .'horiz'ontalj motor ,carried n by said frame and having its power shaft extendfing' longitudinallyV of said frame, Vfeeding Vmeans in said frame -and driven-frorntheforwardfend of Y 'f said motor for feedinggsaidvframe ,over `the mine oor, kerf cutting mechanism amounted.y on said frame and driven from the rear end:` of said motor, said cutting mechanism including a horizontally swingable kerf cutter, said motor arrangedfcentrally on said frame 4between said cutting-mechanism and said feeding means, meansY for adiusting: the kerf cutter 'into Vdifferent elevatedY posiionsrelativezto theframe, :said kerf cutter When'in its lowermost position 'lying in' horizontal; planes above and'swingablahorizontally.;completely .over

nthe topofsaidfeedingimeans and the top Vsurface of said motor, and means `.operable :wholly independently of .the feeding-.means vvfor swinging said kerf Acutter'relative `gtosaidjfrarne.`

5iIn av mining machine, .a :machinelrame adapted to rest` upon..and slide inany .Idirection over rthe mine,floonfahorizontal motor carried lill l above said-feeding by saidv frameand having-its powerzshaft extending .Y longitudinally 'ofsaid frame, feeding :means in said iframe and driven .from one iendof -said motor forfeeding said framefoverpthe minedoor,

an adjustable. kerf cutting mechanism mountedon said frame anda driven from the oppositeen'd of said motor, said .cutting .mechanismiincluding va horizontal kerf cutter, said motor arranged 'centrally onsai'dframebetween said cuttingrmechanism v'andsaid feedingY means, extensible-driving connectionsV between'said' motor :and the kerf cutter, -andimeans separate from` said fextensible driving connections lforadjusting.said kerf .cutter into different elevatedA positions relative to,Y and and means driven bysa'id .motor Yfor adjusting said kerf, .cutter into different elevated `positions means .and the .top surface. of

relativeto therframeiv including cooperating relatively rotatablecscrewA and nut elements, said screw elements moving axially upon rotation of said nut elements; f

A'7,9111' a. mining machine a machinev frame adapted-to rest upon and slide in any direction over the mine-oor, feedingjmeans for the frame, an adjustable kerf cutting mechanism mounted on saidframe including a horizontal kerf cutter,

means Vfor adjusting said kerf cutter into different elevatedjpositions yfrelative to and above said frame, and=means ffor guiding said kerf cutter during such adjustment, including telescopic guiding elementsarranged at opposite'sides of said;frame.'

3.,Ina mining-machine, a frame adapted to rest-upon. and slide inv any direction over the mine floor, arnotor on said frame, kerf cutting mech-f Yanism` thereon includinga kerf cutter adjustable Y into different elevations relative to the frame and actuated by said motor, and `meansV driven by said Vmotor for adjusting saidkerfcutter includ ingl parallel adjusting lscrews and cooperating adjustinggnuts, saidscrews being xed against rotation, and moving axially upon vadjustment of said-kerf cutter. v

, 9. In ya ymining machine, a frame adapted to` rest upon and slide in any'direction over the mine floor, avmotoron said frame, kerf4 cutting mech-Y anismen saidframe including a kerf cutter adjustable-into different elevations relative to the frame and actuated by said motor, and means driven by said motor for adjusting said kerf cutter includingparallel adjustingscrews and cooperatingadjusting nuts, said screws being held against rotation, and means for rotating said vnut elevmentstofeiect axial movement vof said screws.

. 10, `In-aY mining machine, a. frame adapted, to

oor, 4awrnotor:ori-said frame, vlrerf cutting mechanism on said frame including` a kerf cutter adjustableinto dierent elevations relative to the frame and actuated by ysaid motor, means driven byV saidmotor Vfor adjusting said kerf cutter including parallel. adjusting screws and cooperating adjustingnuts, said screws being held against rotation, and `means for rotating said nuts to effect axial'movernentoffsaid screws, and means for guiding said kerf cutterduringsuch adjustment.

11. Inamining Inachine, a.frame adapted to rest'uponand slide 1in any direction over the mine floor, kerfcutting mechanism on Vsaid frame including akerf cutter vadjustable into different Velevations relative to the frame,.means for adjusting said kerf cutter including-parallel adjusting Yscrews and cooperating adjusting nuts, said screws being held against rotation and adjustrest upon and slidein any direction over the mine" f able withsaid kerf cutter, and means for rotating said-nuts, andV means for guiding said kerf cutter during such adjustment including parallel guide members movablewith said kerf cutter.

" 12. In a mining machine, a frame adapted to restvuponand slide in any direction over the mine floor, kerf cutting mechanism on said frame including a kerf cutter adjustable into different :elevations relative to the frame, means for adjusting said kerf cutter including parallel adjusting screws4 and cooperating -adjusting nuts, said screws being held against rotation and adjustable' with/said Vkerf cutter andl said knutsbeing stationary as regards lbodily. movement relative to said frame, means 4for rotating said nuts, and

means for guiding said kerf cutter during such Yadjustment '.includingfparallel guide members l tor and arranged in said frame for feedingl said frame over the mine iloorY and includinga feed movable with said kerf cutterV and cdperating guiding elements on therframe. 1

13.In a mining machine, a frame rest upon and slide in any direction over the mine door, kerf cuttingmechanism on fsaid frame in-Y cluding j ahkerf cutter adjustable i into fdiierent elevations relative tothe frame, means for adjustingjsaid kerf cutter including parallel adjust@ ing screws and I.cooperating adjusting` nuts,V said Y screws beingheld against rotation, means for adapted to rest upon and slidev inany direction' over the mine floor,V a horizontal -motcrjliavingA itslaxisgextending longitudinally ldf said frame,-

means drivenrfrom the rforward end-fof said momember arranged at the'frorward end'ofvsaid l frame and rcooperating ilexible feedingmeansderfV cutting mechanism vdriven from the `rear end of said motor including apivoted kerf cutter mounted on the rear end of said frame,` said motcr arranged central/ly cn said" frame between 'said cuttingmechanism and said? feeding means, and means for adjusting saidkerf cutter intodiiferent elevatedpositions relative to said frame, said kerf cutter when in itslowermost position Y lying in horizontal planes above'andswingable u horizontally completely over the top of said feeding means andthe top surface of said motor.f Q15.A In amining machine, a machine frame adapted tof'rest upon Aand slide in any'direction over the mine'ilo'er, `a horizontal motor having its axis'extending..longitudinally of said frame,v

means driven from theforward endofL 'saidmxc tor and arrangedin saidframe. iorfeedingsaid frameover the minerfloonandfincluding a feed member arranged at thefforward lend" df. said frame and cooperating flexible,feeding meanrat kerf cutting mechanism driven'iromV the rear end of .saidrmoto'r including apivotedkerf cutter mounted on the rear-end of said frame, lsaidv motcrarranged centrally onrsaid frame betweenV said cutting mechanism and said feeding. means,

and means f or adjusting Asaid kerf cutterfinto rco different elevatedp'ositions relative to said frame,

said kerf cutterwhenin itsA lowermost position lyingv in horizontal planesab'ove and .swingable horizontally completely over the top of said feed# ing rmeans' andthe top surface `of said motor, and means for swinging said ker cutter about its pivot.

16. In Aa mining over the mine ocr, means for feeding 4saidfr'arne over the minelfloor'during'cutting, an adjustable kerf cutting mechanism mounted on said frame including aswingable keri cutter .adjustable,. into diierent elevated positions relative toisai'd frame,

means forguiding said kerf `cutter during such adjustment, and means arrangedon said frame:

ina transverse zone between' said hert cutter pivot and said guiding means fcr'efiecting Vsu'cliadjustment of said kerf cutter. Y

adaptedto rest uponj'andslide in. any direction over l the mine floor, a motor-.von said. frame,

' f means for. feeding 'said frame, keif cuttingmechanism mounted on said trarne including a swing-` adapted to y 'nuts machine, a .machine frame adapted to restupon and slide in any direction.-

j'l7. In a miningmachine, a, machine frame able .kerf weer actuar-edn sa@ autor,l andl means driven,` by SadfV motor'l for Y adjusting jsaidV kerf cutter into different elevated :positions rel-K ative t said vframe including parallel adjusting s'crex'gvfs movablev with said ylferrf cutterv during such adiustmentandecoopeatingf adiustinsiluts., CarriedY withinusaidframe V`and. heldjstationary asregards bodily movement, relg'itiveV tofY said frame- ,18- In aamininsgmachne; a .machins frame adapted torest j upon J and slidez-izr. any direction means forfeeding said frame ,ker-f, i Cutting mechf:

-nsmmuntedronsaid frame including asv/ins.-`

able kerf cutter actuated by saidru-motor,

means drivenvfby fsadmgter ignari-justine Said kerf cvutter'intozd'if rent,elevated` positions rel-l ativ $055211@ fraine ancludins, vpalrallel adjusting f screws movable with; Asaid kerf cutter during suoli adjustment andheld against `rctatilort; Cooperat:

ing adjusting nuts vcarried withinrsaid frame; and

held. stationary` as regards bodily movement rel"-Y aiivefio, j Said frame,

V19..V n, a =-mining--machine, a vmachineframe adaptedtogrest upon-:and slide, in any direction over the` mine ooi', flexible; feeding, means for said frame, vv:lfzerf cutting mechanism mounted on-therameinluding a: horizontally swingablef and, means for'rctating said Y' keri cutterymeans-for adjusting the elevationgot separate and distinct Vfrom said adjusting means for f swinging Sdi klf;1;cutter. including :agear aifahedt0. the. lieti; mitte-r,-k a,l pinion meshing with/.said gearg,v1 and lmotor operated devices for rotating said pinion including aftelescopicltorque Shafi-Vnnectedio ,Said pinion and ai spear element ifi Within said frames-and relativev to which-said. Pinion is; adjustablefw,drivnssadptorque shaft adapted t restV upon andl slide ink any direction over, themineiioqr, feeding means for said frame, and j. u, an Y, adjustable g kerf :cutting Y mechanism mounted onsaid frameYand'fincluding,al horii `z onfcal kerf cuttervpivoted vfor swinging move.` ment, a ,support'ongwhich saidf'keif cutter isi mountedA andwhich is adjustable in a vertical direction ltol'move the y-kerf 4cutter into 1 diiierentv 4 elevated positions: relative to y said frame,- motor operated devices for actuating saidkertcutter including-.ja kerfcutterdriving element-fand a telescopic'torque shait forjrotating said element, and-means driven independently of saidtorque shaftforrswinging said kerf cutter.f

"-'i2.1- ,In aiminina machinenaamachme .iframe adapted tc restgupon andslide'in any direction over the mine flour,` feeding; means for said frame,

and an adjustable? kerf-g; cutting -meclianism zontal lverf*cutter-,pivoted vforjswinging4 movement,` asupportwhich' carries said -kerf cutter'v and is mounted for bodily adjustment inla vertica-lydirection, a motor carried by said; frame, clutch 4'controlled adjusting y mechanism operated byjsaid motelgto eifect aforesaid bodily adjust-V ment-of said kerf cutter support, means-'driven cluding a ker cutter" driving element and a telef kscopic torque shaftlfor rotating saidgelement. and

means driven; byfsaid "motor independently;-ci` said torque shaft "foriswing'ing said kerfV cutter.:

22. In a 4mining, machine,A a- Vmachine frame;

adapted to :rest upon and s'lidein any directionV over the mine oor,feeding means forsaid frame;` andy ank adjustablev kerf --cutting -mechanism;

mountedf on said frame and 'including ai, horli-r Y by. said' motor foractuating said kerf cutter in-.

zontal kerf'` cutter pivoted''for swinging"rnove-i mentya-suppor't which carries said kerf cutter,

Y andr is mounted: forrbod'ily adjustment in'a' ver-5 20'" y Y by said frame and'` relativev to `which Vsaidsupf port is adjustable, drivingconnections betweenv tical directioma motor carriedr by said' frame;A clutch controlled adjusting mechanism-- operatedby saidmotorto effect aforesaidibodily' adjustment ofqsaidkerfcutter support'Qmeans'driven by n .Y said motor for actuatingsaid kerf cutter includ-YY fadaptedto rest'upon'andslidev in any direction Vover the mine floor; feeding means forsaid frame,l aV swingable kerf cutter,'a support which carries said "kerf'cutter andlismountedfor bodily ald-lv justment in avertical'direction, amotor 'carried said motor and said kerf cutter for lactuating'the latter, and devices'driven by saidmotor for swinging said kerf cutter about itsipivotirrespective of'V the adjusted-'position of saidsupport'including y-a telesCOpic torque-shaft distinct from said cutter- AVactuating means-gearing carried by said support and drivenL by said' tor'vque'fshaft`V and gear'-Vv ing carried `within 'said torque, shaft. 1 f

frame fori rotating*said 24. In 'az mining machine, amachinefram adapted tojrest upon and slide ini-"any direction over themine noor, feeding ineansfor said frame,`V

a swingablekerfcuttelf,I a supportwhich pivotally carries Y*said rkverf" vcutter and vis, mounted forbodily adjustmentina vertical direction, a

Vmotor carried by saidframeand relative to which said supportisadjustable,y vdevices-`driven bysaid motor'l for adjusting said support. in 'aforesaid' vertical directionF fincluding parallel' adjusting'y screws arranged with their axesina verticalVv plane Vparallel ftd a2 transverse 'verticall plane :in-v

:rangedwiththeir axes in a vertical plane' parallelv with and',forwa1dly` oft-aforesaidItransverse" ver#` Vcluding the pivotal axis off thekerf cutter;and"` means for guiding-'said support vduringsuclfrfad-A justment including parallel guidingaelcments ar tical-planes. v'

25"." In f a .mining machine-f a machine lframe" y adaptedlto'; rest upon and 'slidein any *di'rectioni overfthe mine floor; feeding V'means/for saidY-'jramefc'v a swingabie kerfeutter, @supportwhichpiyotany f carries the kerf cutterfandis mountedforfbodily' f adjustmentinl @vertical-direction, a motor car# ried by: saidfraxne andl relative to'jwhich-A said supportgisi adjustabla-devices-driven by said motor for actuatingtlie kerfficutten and-.devices driven by said motor for swinging said kerfcut-A 60vr ter, eachy of said` devicesfincluding ai telescopic' 26'. VIn` a minin'gfrrnachinegla ,machinefframe adaptedito restuponj'and slide inlany'f direction over the mineoonlfeeding' means forsaid frame,l av swingable kerf'cutter, a support` which pivotal?l ly carries" .the kerf"V cutter and is *mounted for'` bodily adjustment Vin aver-titfsalV directionjamoi tor carried by-said'frarneiandrelativeV to which-k said supportfis` adjustable, devices driven by saidv 7o4 Y c driven bylsaidlmotor' for-swinging said''kerf cutmotor'fcr actuating. the kerf-'cuttenl and devices ter, each Y of said devices A- includingf aftelescopic Vtorque l' sliaft, 4and :each I torque1 sliaft including a n shaft elementjournaledon said fsupport, altubua lar shaft;` element journaledfwithin isaidLY frame starre and'withinl whichrsaid first mentioned shaftelement is telescopically arranged and a splined connection between' said shaft elements.

2*7- In a 'mining machine,-a machine frame adapted tofrest upon and slide'infany direction over thevmine floor, feeding'means kfor-said frame, aswingable kerf cutter, alsupport which pivotally'carries the kerf cutter and is mounted for bodily adjustment in a vertical direction, a motor ,carried byv said frame and relative to which said' support is'adjustable, devices driven by said motor for actuating the kerf cutter, and devicesseparate *and* distinct from said actuating devices and drivenby said motor for swinging said kerf cutter,'each of said kerf cutter actuating and'swing-A ing devices including a terminal driving elementV journaled on and adjustable with said support, Y 2 8.7I,na mining machine, Va'r'nachine frame adapted to rest upon and slide in any direction over the mine floor, feeding means for said frame, a swingablev kerf cutter, a support which pivotal ly carries thekerf cutter and is mounted for bodilyadjustme'ntin a vertical directioma motor carried bysaid frame and relative vto which said support is adjustable, devices vdriven by said motor'for actuating the kerf lcuttenand' devices driven by said motorgfcr swinging said kerf cutter, eachrof said kerf cutter actuating and swinging devices including a terminal driving element journaled on and* adjustable with said support, gearing carried within 'said frameanda telescopic driving4 connection between said gearing and saidterrninal driving element. A

1 29. Ina mining machine, a'rmachine frame adapted'to rest upon and slide `in any direction .over the'mine floor, feeding means for saidfrarne,

aswingable kerfcutter, a support which pivotally carriesjthe kerf cutter andlis mounted for bodily adjustment vin a vertical direction, a motor carried by said frame and relative'tofwhich said` support isjadjustabladevices drivenby said motor for'actuati'ngthekerf cutter, and devices drivA en by saidlrnotor for'swingin'g rsaid kerf cutter; each of said devices including a terminal driving element journaled onv andfadjustable with said support, gearingfcarried by `said frame and-a telescopic drivingconnection between said gearing andsaid terminal driving element, said telescopicco-nnections each including a shaft element journaled on said support, a tubular shaft element J'Oilrnaledwithin said frame and Within vwhich, said first mentioned shaft element istelescopically arranged and a splinedconnectionbetweengsaidshaft' elements. Y .30."In armining machine,V a machine frame adapted to restuponand slide inany direction over the mine floor, feeding means for said frame,

a swingable kerf cutter, a support which pivotal;

Y1y carries said kerf cutter'and is mounted for bodily` adjustment in a vertical direction, a motor carried by 'said frame and relative to which lssl said support is adjustable, devices driven by said' n motor for actuating said kerfcutter, and devices driven by said motor for swinging said kerf cute` Y ter in opposite directions about its pivot including areversing mechanism' carried'within said frame and connectionsabetween said reversing mecha#v nism andsaid'k'erf,cutterincluding a telescopic torque shaft.: l j f J Y. 31f1I'n a lrniningmachine, amachine frame adapted tol rest4 uponand' slide inany direction over the mine oor, feeding means for said frame,

, a swingable kerf cutter,l a support which pivotally carries saidkerf cutter and-is mounted for bodily adjustment in-a'vertical direction, a motor-car-` through :said i 'reversng f mechanism Y 'andl both ried by said frame and relative t'owhich rsaid support is adjustable, devices driven by saidmo-VA tor for actuating said' kerf cutter, and devices driven by said motor for swinging saidkerf `c`ut'' ter in opposite directions about its pivotincluding a reversing mechanism and a speed reducing i transmission mechanism y carried 'within'nfsaid Y frame and driven through said reversing mechaand means for relatively rotating said screws and'l nuts, and means for guiding said kerf cutter during such adjustment including parallel-guide members movable with said ker-f cutter and cooperatingguiding elements on the framefa'nd' movable relativetoand guided by saidlframe.`

33. Inv a mining machine, a `machine frame adapted to restY upon 'andV slide *'inf anyrdirection over the mine floor,- feeding meansl for saidframe';

a swingable kerf cutter; a supportwhich.pivot-V ally carries the kerfeutter` and? is.' mounted for bodily adjustment inl a'verticalidirection, a mo#A tor'carried' by said-frame andfrelative to 'whichV said support is adjustable, devices `driven by Asaid motor:L for actuating `said kerf cutter including a kerf cutter driving element journaledon i `said. supporta gear journaled Withinsaid frame and connections including a telescopic torqueshaft driven by said 'gear for rotating lsaid, kerf cutter driving element, and devices separate rand dis.

tinct from ysaid driving element rotating connections anddriven by said gear for swinging said Y kerf cutter.. Y A

34. Ina mining machinefa machine frame adapted to rest upon Vand slide inanyfdirection over the mine floor, feeding means forfsaid frame, 'ai swingable kerf. cutter, a support which pivotally'carries thekerf cutter andis-mounted' for bodilyadjustment in a vertical direction, aV motor carried by said frame and relative to'iwh'ich said support is adjustable, A devicesdriven-bysaid vmotor for actuatingsaidkerf cutter includinga.

kerf cutter drivi'ngelementy jour'naled-onA said support, a gear journaled withinsaid rframe and connections including` a f'telescop'icf torque :shaft driven by said gear forY rotatingjsaid-kerf cutter driving element, and-devices driven by said vgear 4 for swinging said kerf 'cutter`aboutits pivot; in opposite directions including areversingmechanism carried within'said frabr'ne.`4 Y Y 35. In a-mining machinefa machine Yframe adapted to rest upon and slide any directigorfi over the mine floor,' feeding,Y means: for said frame, a swingable kerf cutter, a supportiwhich pivotally carries the kerf cutter and is mounted for bodily adjustment'inra vertical ,direetiom'a motor carried by said frame and relative twhich' said support is adjustable, devices driven by said motor for actuating said kerf cutter including a kerf cutter driving Aelervnent journaled' "on said support, a gear journaled withinsaid frame'and connections including a torque shaftdriven ,by said gear forrotating said kerf cutter driving element, and devices driven by said gear fo'riswingf ing said rkerf cutter about its pivot in Vopposite directions including `a reversing imechanisin and a speed reducing transmission. mechanism driven mechanisms `carried-withinV said iframe."

"36, Ina mining machina afinachine'frame Y adapted to rest upon and slide in anydirection Y Y .5 Y

overk the mine floor, feeding means for said frame;l a swingable kerf Y cuttergafsupportwhich pivotally carries the kerf cutter rand is mounted' for-bodily adjustment in ayertic'al direction, a l Y motorcarried by said frame and'vrelativelto which k said support is adjustable, devices driven :by vsaid motor for'actuating saidkerf cutter including a kerf cutterddriving element -journaled on-said support, a gear journaled within saidframe and connections includingfa-V telescopic torque'shaf't driven bysaid gear for rotating said kerf cutter driving element, and devices driven by Asaid 'gear' for Iswinging said kerfV cutter Vincluding rafkerf cutter' swinging element journaled on 'said support, a driving: elementi.journaledv Withinr-saidVV t frame and connections -Aincluding a ,telescopic vtorcprie shaft between saidkerf cutter swinging element vvand* said driving-elnne'nt.

. 37.1 In amining' machine`,fa machine frame adapted to rest upon and slide 1in anygdirection over` the mine hoor, feeding means -in'said frame for feeding said frame` over'the mine. floor,

kerf cutting mechanism mounted on said .frame including a horizontally swing'ablekerf cutter,Y

means for adjusting the kerfcutter-into'different elevated positions relative tothe frame, said lerf cutter'when in its lowermost position lyingin horizontal planesabove said feeding means fand the top surface of "saidframe and swingable horizontally 'when in',`r said position completely over theV tops of said-feeding'mea'ns and said frame, andmeans for swinging 'said kerffcutter relative'to s'aidframe. Y

38,' In a 'mining jmachine, Ya machine Vframe adapted to re'stupon andsflide inf'anyfdirection over the mine-oon'ffeedingmeans in said frame L for feeding said" framefoverl the 'mine' floor,

kerf lcutting mechanism mounted on said' frame including f Jai A'lioriontally swingable keif cutter,

means .for adjusting the kerf cutter into different Y, elevated positions relative to the frame, said kerf cutter lwhen in itsV lowermost position lying' in horizontalplanes abovegsaid feeding means and the topsurface of said frame and' swingable horizontally-whenin said position fcompletely 'over` thel top'sfof said feeding means andsaid frame,' and 'means operable wholly independently of the feedingmeans for swinging said'kerf cut# ter relative to saidframe.

39;. In armining machine, amachineframej adapted vto'restfuper-1 and slide in anydirection` overthe :mine f floor, a motor carried-,by said i ,Y frame, feeding means in' said frameA forjfeeding the Yframe 'over `the minel floor', said lfeedingv meansdriven byV said moij, `)1, .lerf'cuttingjrnecha-Y nismfmountedg. on4 saidY frame including a horizontallyswingablekerf icutter which is driven adjusting saidkerf cutter into different elevated positions relative tothe frame, said kerf cutter when vitsklovverrnost positionlying in horizon-A tal planes abovesaid feeding means and the top' when'f'in saidposition'completely fover the tops of said feedingmeansland saidmotorjand means drivenv by saidmotorfor swinging vSaid kgrf, utp -ter relative tothe frame- Y i comY bysaidmotor, `rnea'nsdriven byfsaid `moto: `for o `surface of said motor and swingablefhorizcntally Y 40. VInv-a minirlgmachine, `a machine frame* auzla'pted` to rest upon and slide inlany direction over the minet-hoor, amotor-v carried by. said frame; feeding meansinsaid frameV forfeeding u ii Y most position lying abovegvsaid feeding meansV 25 adjusting means including i a 'Vrnotorrfo'n said' frame and relative to .which said'kerf cutter is adjustvdriving connections separate from said the frame overfthe mine floor, said feedingmeans driven by said motor, kerf cutting mechanism f mounted .on said frameincludingsa horizontally lswingable 4kerf -cutterpwhich is driven', bygsaid motor, means ldriven by. said` motor. `for adjusting of said motorandswingable horizontally-when in said position completely overftheptops of said feeding means; and ,said fmotor, f and l means .oper- Y ablewhollyYindependentlygcf `the feeding means. for swinging said kerfj cutter relative to the frame. Y'

Y justing means including a motor on saidframe and relative to which said kerfcutter is adjust-r able, atrans'verse shaft journaledinsaid framez l1.In a. mining machine, a'machine frame adapted toV rest uponand slide in any direction;V over the mineV iloor, feeding means in said frame for feeding theframe over the mine, door,

adjustable kerf cutting mechanismmounted on said .frame Aincluding .a horizontal kerf cutter,v

means for` adjusting said kerf'cutter into different elevated positions-.relative to, and above said frame,.Said'kerfcutter when in itsflowerand the top surface of-said frame, and extensible means for drvingsaidjkerf cutter.4 A

42. In -a mining, machine, aj machine, frame adapted torest uponandslide in any direction overV the` mineiloor, a kerf cutter mounted on said frame for adjustmentintoparallel cutting positions and for pivotal :movement V'Relative thereto,y means for swinging said4 kerf cutter about its pivot relative to said frame, Vandmeans4 for adjusting said Akerf-cutter-` into aforesaid parallel cutting positions.l relative t9 said framazsaid adjusting means including a. motor onvsaid frame and relativefto whicnsaidkerf clutter-Vis adjustable, a transverse lshaft,j ournaled said frame,

a pairk of adjusting ldevices'zon'edon; each-1side.n of

saidl frame, gearing connectingthe ends ofsaid shaft; Y with saidadjusting deyices, respectively,

said transverse shaft.V

. 43.1111 a minngrmachina'fa inacliinejfranie and driving connections between` said ,motor and .adapted to rest upon andgslide inanydirection` i Vover the minejfloor, :a kerfhcuttermounted loni e said frame vfor YadjustmentcintoparallelV cuttingf` positions ,andfor, p ivotall movement relative thereto, means for swinging said ,lferf cutter about its pivot relative to said`frame',and means for adjusting said kerflcutterlinto aforesaid' parable, a transversesliaftjournaled in .said frame,A

a rpair of adjusting devices one onA each sideV of said frame, gearing connecting theendsIcf said shaft with said adjivistingdevices,v respectively, and reversible driving connections` betweenvr saidv motoriY and,` said .transverse .shaftA for'` driving the z latter either, ofY ,opposite directions Awhilegthe motor runsV continuously in the same direction.l Y

44. In a miningmachine arnachine frame adapted to. rest upon'r the slidefinany direction over. the mine floor, aY kerf cutterrnouited on said frame for adjustment into vparallel cutting positions and for pivotal V'movementrelative thereto,VK means;v for 'swinging Y, said?Y kerf cutter adjusting means including a `'n i'otor onfsaid frame and relative. to which saidkerf cutter isf i adj ustable, a r-transy'ferse shaft Qurn'aled ,j l said adjusting frame; a pair of screw and nut adjusting devices onecneaclrside of 'said f rame'gearing connecting the ends of saidshaft with said adjusting devices, respectively, and driving connections between said motor and said transverse shaft. v

justingsaid kerfwcutter.into-'aforesaid parallel v cuttingpositions relative tosaidframe, said ada pair of screw and `nut'adjusting devices one Vvon'each side of said-frame, gearing connecting the ends of saidshaft with said' adjusting devices, respectively, and-reversible driving connections between said VmotorV and; said t transverse shaft for driving thelatter in either of opposite directions while the motor runs `continuously in the same direction.-` 1, L.; j v ffy 46. AIn a l mining machina a "machine, frame adapted toY rest upon and slide in n any direction ,over` the mine .oor,a. kerfbutter mounted on said frame for adjustment into parallel cutting positionsand for pivotalmovement4 relative thereto, means for swinging .fsaidokerf cutter about its `Aand rdriving connections between said motorY and said. ytransverseshaft, said gearing vincluding worms driven bysaidl shaft oneon each end of said shaft,fand worin wheels, driven by said worms and operatively connected to saicl'-adjusting devices.

Il?. 1n, a Amining ajgiparatus,L a machine lframe adaptedto restjupon,andfslideiin any direction over the mine Vivoorfa kerf cutter mounted on said frame vfor adjustfrnent into parallel 'cutting .posiVr tions andfor pivotal movement relativel thereto,

frame-and relative towhich said vkerf cutter is adjustabla a driving element journaled in said Vframe, a drivenelement adjustable with said kerf cutter, eXtensible driving connections between said 4drivingand driven elements; and reversing driving connectionsin said fratrie for connecting saiddriving element to saidmotor.

Y. 48. :In a' miningfapparatus, amachinefraine adapted to rest upon and .slide rin'any direction over the mine floor, ajkerf'cutter mounted on said frame" for, adjustment into parallel cutting positions and for pivotal movement relative thereto, 4VmeansA forY adjusting saidgkerf cutter into aforesaid parallel ,cutting positions ,Y relative e to said frameand means ,for'ls'winging saidfker'f cutter about its pivot relative to said frame, said kerf cutter swinging means including alrn'otor on said frame and relative to which :said kerf cutter isY adjustable, a'driving element journaledin said frame, a'driven elementadjustable withsaid'lierf means for adjusting: said kerf cutter into afore- :said parallel cutting .positions relative tosaid frame, and meansforjswinging said kerfcutterY about: its pivotrelative, tosaid frame, said kerf cutter swinging means-including a motor on said cutter, extensible `drivingconnections, between saidrdriving and driven elementaandlreversing driving connections in said frame for connecting said driving element 'to said motor,z,said`reversing connections including a transverse shaft, clutch controlled gearing between said shaftand said motor for driving the former in one direction, andclutch controlled gearing between said shaft and said motor fordriving the `former inthe opposite direction. f

49;-Ina mining machine, a machine frame adapted to rest upon and slide in any direction over the-mine iioor, feeding means forv said frame, and an adjustable kerf cutting mechanism mounted on said frame and including a kerf cutter,l a support on which said kerfutteris mounted. and which is f adjustable in avertical direction to move the kerf cutter into differ-i ent elevated positions relative to said frame', mo tor operated devices for actuating said kerf cutter including a kerf cutter driving element and an extensible shaft connectionjfor rotating said ele'-V ment, and means ,driven independently of said extensible shaft connection for adjusting vsaid kerf cutter and support in. aforesaid ,vertical dil support relative to said frame, and-devicesseparectionrelative to said frame.

50. Ina mining machine, armachine frame adapted to'rest uponand slide in anydirection over the mine floor, feeding meansforsaid frame, and -Van vadjustable Akerf"v cuttingq mechanism mounted onsaidVr 'frame including a; horizontal kerfcutterga support which carries'said llrerfr cutter'and is mounted. for bodilygadjustment in a vertical direction relative to said iframe, a

motor carried by said frame and relative Ytc which said kerf cutter support is adjustable, means driven by saidmotor [for actuating said kerf cutterY includingxa Akerf cutterY driving ele, ment andan extensible shaftA connection forrotating vsaid element, `andclutch controlledady over the mine floor, feeding means for said'frame, A and an adjustable kerfY cutting mechanism mounted on said frame including a horizontal kerf cutter pivoted for swinging. movement, a support which carries saidV kerl cutter and ris mounted for bodily adjustment in a vertical direction relative to said frame, a vmotor carried by said frameand relative to which said kerf cutter support is adjustable, means driven by said motor for actuating said kerf cutter including a kerf cutter driving element and an extensible motor independently of said extensible shaft connection to effect aforesaid bodily adjustment of said kerf cutter support, and meansdriven by said motor for swinging said kerf cutter. including an extensible shaft connection separate from said first mentioned extensible shaft connection.

52. In a mining machine, an elongated machine frame adapted to rest upon and slide in any direction over the mine floor, feedingmeans for said frame, a kerf cutter projecting from one end of said machinea support which carries said lrerf cutter and is mounted for bodily adjustment in a vertical direction relative to said machine frame, a motor carried `by said frame and relative to which said support is adjustable, devices driven by said motor for adjusting said support in aforerecense ingjscrewsarranged withtheir axes in a vertij-v said;Verticall direction including-parallel adjustcal plane parallel `to avertical plane transverseto the machine frame 'and'intersecting the kerf cuteV ter-, ,and means for guidingV said support during such adj ustment including parallel guiding ele' ments arranged with jtheirfaxesin a vertical plane parallel .with aforesaid transverse vertical planes and, nearer the 'endof the lframe from which thekerf cutter does notproject than said' planes. Y .v 53. In a mining machine, al machine fra1ne Vadapted to rest Yupofnfand slide in any direction over the mine iioor; feeding `means for 1said` frame, a kerf cutter, asupport which carries the i kerf cutter'and is mountedv for bodily adjust mentin ajvertical direction relative to said frame, agnotor. carried by Said. frame and relative Ito which said' supportis adjustable, 4devices driven by said motor forY actuating said kerf cutter i n,-

cluding akerf cutter driving element journaled on said support, a gear journaled within said-frame and an extensible; driving connection driven by saidgear for rotating said kerf cutter driving element irrespective of the adjusted position of said rate and distinct from-said extensibledriving Vcpnnection and driven by saidV gear-forbodily yadjusting said kerf cutter support Vin'aforesaidV vertical direction. f

- 54. In a mining machine, afmachine` frame adapted lto. rest upon yand slide @in any direction over the rcinefloor, feeding means for said-frame, a kerf cutter, a supportlwhich carriesthe kerf cutter and is mounted for, bodily adjustment in connections including an extensible driving conv '4.0 suppQrt, a gearjournaledwithinsaid frameand Y nection driven by said, gear for rotating said kerf cutter driving element, andl devices driven by Sadfeeergferzbedily adjusting Saidkerfutter drivenbysaid motor independently of said' ex tensible driving connection. i 55. Ina mining machine, a machine fram adapted to rest -upon and slide in` any direcf tion over the mine floor, a kerf cutter mount-V ed on Vsaid framefor adjustment into parallel cutting positions, and Vmeans for'adjusting said kerf cutter into aforesaid parallel. cuttingpositions relative to said frame, said adjusting means including a motor on said frame and relative to which said kerf cutter k is adjustable, a transversefshaft journaled in said frame, a pair of u adjusting devices one on each side ofy saidframe, gearing connecting the'endsof "said shaft with saidj adjusting devices, respectively, and driv'-V ing connections between said motorv and said f transverse shaft.; Y

56. In a mining machine, a machine frame Vadapted to restupon and slide in any direction over the mine iioor, a kerf cutter mounted on said framefor adjustment into parallel cuttingr` positions, and means for adjusting said kerf cutter into aforesaid parallel cutting positions relative to said frame, said adjusting means in-i.

cluding a motor on said frameA and relative to which'said kerf cutter is adjustable, a transverse shaft -journaled in said frame, a pair vof adjusting devicesone on each side of said frame,

, e Y, i5 support in aforesaid verticalgdirection relative l to said frame and including adjusting devicesA 1o gearing ebneetmg 'thee'nds fof said shaft with said adjusting devices, respectively; and reversible driving connections between said'motor and said Vtrans/verse shaft for driving the latter in either of opposite directionswhile 'the motor runs coning ainotorcn ai frameand relative to'which i said kerf cutter ,d-jus'table,av transversev shaft 'journaled rame, 'a pair jof screw and nutadjustingidevicespone on each side -of said frame, gelariigcnnefctiifig the ends of: said'shaft WithM ,said adju ting devices, respectively, and

driving connctierls; bettveenfsaidfmotor and said transverse shait. r Y n. K

r 58. VIn a miningfmachine, agrnachin'e `frame adapted to rest""upon and slide'in'anydirection over the mine iioor, af-,kerf cutter mounted on *said framefor adjustment, into parallel cutting positions, and means for adjusting said kerf cuteAY ter into aforesaid parallel cutting positions rel-ffv ative to saidIErarne, s-aid adjusting meansin-V cluding -afmoto'r on'said frame and relative to" which said Akerf cutter isY adjustable, a transverse shaft journaled in said "framaa pair of screwv and-nut,adjusting` devices one on Aeach side 'of saidfrrame, gearing connectingthe ends of said shaftV` lwith' said yadjusting devices, respectively,

and reversible driving connectionsbetween.saidY rnotorlandsaid transverse' shaft forv driving the latterNin-eihther `o f Y opposite directions whilejthe motor 1 runs continucui'sly in theI same direction.

59:12u'afininingjmachine,` a Ymachine frame adaptedrto rest upon Vandrslide in anydirection over thefminefiioorfa` kerf Acutter f mounted on said frame Yfor adjustment into parallel cutting positions, andmeans for adjustingsaid lierf cutter into aforesaid parallel cutting positions relative `to lsaid trarne, said adjusting means intestate cludin'g" antorl 'on saidN i'ramen and relative to which saidV kerf, cutter is'adjustable, aV transverseVK shaft ljournaledV inV said frame, al pair yof adjusting devices one on each side of said frame, gearingconnecting the ends lof said shaft with said adjusting devices, respectively, and driving connections between `said motor and saidV transverse shaft, said gearings including worms driven by'said `shaft one on each end of said shaft, v*and Worm Wheels driven by'said Worms and operatively connected to said adjusting devices. Y, w l

V60f'ln a 'mining :fapparatus," a machine frame adapted "to rest vupcn and slide in any direction over the mine d'loorgza fk'erf cutter mounted on saidV iframe for :adjustment into parallel cutting positions,r means io-rHiadjusting said kerf cutter into aforesaid paralleli cutting positions vre1- ative t `said "freine, fsaid kerf cutter adjusting meansi-neludiriglatmot'or on said frame and relative ,towhich'said'kerf cutter is adjustable and .reversible'idriving ccinnectionsrin said frame, and

kei-'f cutter-i driving vmeans actuated by Vsaid motor including a driving'element journaled in said frame, a driven element adjustable with said kerf cutter and extensiblev drivingconnections between said driving and driven. elements.

:611 In afmining Yrnachin'e,V a machine frame v f ',adapted'tore'stnpon and slidein any direction over the mine floor, feeding means for said frame,

a kerf cutter, a support which carries said kerf cutterA and vis mounted for bodily adjustment in a vertical Adirection relative to 'saidA frame, a Vmotor-carried by saidr frame and relative to which Vsaid support is adjustable, devices driven by saidmotor for actuating said'kerf cutter including'jl-a kerf .cutter driving Velementf journaled on said support, aV 'gearjjournaled within said frame andex'tensible driving connections be- `tw'een'said gear and ksaid driving element, and

means separatev and distinctfrom saidextensible driving connection for bodily adjusting said support in'aforesaid vertical direction relativeI to said frame. Y A Y l' MORRISPL HOLMES.

CERTIFICATE 0F CORRECTIN.

Patent No. 1,996, 766. April 9, 1935.

MORRIS P. HOLMES.

lr is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page l, second column, line 23, the semi-colon should be a` comma; and line 25, the comma should be a semi-colon; page 4, first column, line 21, claim 3, for "swing'ably" read swingable; page 5, second column, line 34, claim 19, after "gear" strike out the comma; and page 8,first column, line 65, claim 44, for "the" rend and; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent (lffice.

Signed and sealed this 18th day of June, A. D. 1935.

Leslie Frazer (Seel) Acting Commissioner of Patents. 

